Wrapper for wound filamentary masses



"Aug, 14,1945.

F. A. DECKER, JR., ETAL WRAPPER FOR WOUND FILAMENTARY MASSES Filed Oct. 16, 1943 aladldfllsqnlall 000000000000000000000n0000. .00000000000 0000. ..00000000 0 0000000000000004` "all /iIIII/ INVENTR.

f-f/D/NN DECKER JR. LIYNW/L. K. SPHNGLR rl Iolllllllbi:

ATIjoRNEY Patented Aug. 14, 1945 Ferdinand A. Decker, Jr., and Lynwill-K. Spangler,

Parkersburg, W.- Vra., assignors to American Viscose Corporation, Wilmington, Del., a corporation of Delaware Application october 1s, 194s, serial No. soaszs (ci. zza-a7) 4 Claims.

This invention relates to an improved wrapper.

of permeable paper or paper-like material adapted to be applied to wound filamentary packages, such as those formed on bobbins or -in centrifugal buckets during the spinning of artificial filaments, lto protect them during subsequent processing with liquids and gases and also during subsequent shipment.

It is an object of this invention to provide a novel paper wrapper which is readily applicable to and removable from the wound package. Another is to provide a paper wrapper which is expansible and conformsto the shape of the cake more satisfactorily than the wrappers heretofore used, thereby providing greater protection to the windings of the cake. Further objects land advantages will be apparent fromthe draw- -ing and the description thereof hereinafter.

In the drawing, illustrative of the invention,

Figure 1 is a perspective view of one embodiment of the invention,

Figure 2 Vis a developed view of a modification, l

Figure 3 is a developed view of another modif of a wound package of annular shape or the insertion of a wound package ofsomewhat larger external diameter into the sleeve. 'I'he wrapper after contraction or expansion from normal size tends to return to normal size unless too severely crumpled in the former case or torn in the latter. By wrapping an annular package with a slitted sleeve having a diameter when in normal,

relaxed condition of a size ranging between the internal and external diameters of the package. the .wrapper will tend to'seize all surfaces of the package thereby conforming thereto and preventing displacementv of the windings thereof. After becoming wet during liquid processing, the cover clings to and tends to adhere to all surfaces of the package. However, upon subsequent drying, the-life` and spring-like quality of the wrappenreturns.

For uniformity of structure, the slits should be approximately of equal size and evenly spaced in the rows and between the rows. However, the invention .is not restricted to 'such preferred structures, but may comprise modification thereof in which the slits are of various sizes and are not uniformly spaced either in or between the rows. Again, instead of alternating one by one the rows of one set with those of the other. they may be alternated in sets of two or three, or one row of one set may be alternated with two or more rows ofthe other set. Instead of making straight rows, 'they may be irregular. The only essential relationship is that the slits in some longitudinal portions of the sleeve-like .-member be staggered with respect `to those in As shown in Figure l. the wrapper is constituted of a tubular or sleeve-like structure 2 of paper or paper-like material which is provided with a multiplicity of short slits 3 extending gener-ahy parauei to the axis or the tube orl l I between -the slits of the other set and partially overlap the ends of the adjacent slits of the other set.

By this construction, the tube or sleeve may easily be expanded, or reduced greatly in diameter, thereby facilitating its insertion internally other, preferably adjacent, longitudinal portions so that the geometric projections of the slits in the former extend across the unslit gaps between the slits in the latter. Furthermore, additional perforations may be provided if desired. In making the sleeve, structure, a plain sheet of l the papermay be die-cut to form the desired arrangement of slits and then the opposite side edges may be Joined by cementing, crimping, sewing, stitching, coalescence where the paper conthe wound package and in wrapping is prefer-l ably disposed Ain contact with the interior of the package, the cut-out portions l taking care of any excess of the paper. If desired, the `cut-out 1 may be applied in this way, the wrapper shown is that of Figure 2 with the unslit end 6 extending inwardly from the larger end of the cake (shown at the bottom) and the siitted portion extending from the larger end around the outside of the cake, over the top, and then inside the cake.

Figure 5 shows another wrapping arrangement which may be employed with' the wrapper oi' Figure 1 but is especially useful with the wrapper of Figure 3. Assuming the wrapper of Figure 3 to be shown in Figure 5, the intermediate-unslitted portion 8 is disposed internally, the shorter slitted end I bein wrapped over and around the smaller end of e cake shown at the top and the longer slitted end II being wrapped around the outside of the cake and around th'eend I0 of the wrapping into the inside of the cake. Where the slitted portions III and II engage'each other, .they tend to' interlock, thereby assisting the maintenance of the wrapping throughout processing of the wrappedpackage.

Figuref shows the arrangement of th'e wrapper of the package of Figure preparatory to unwinding after completion of processing thereof. For thispurpose, the wrapped cake is placed upon a suitable support I2.' ,The-outerwrapping II is stripped oil the cake and the overhangingportion of the end III is folded back on itself, after which, the conventional resilient cuff-like insert Il and the conventional inverted "pie-pla I3 are set in place. 'I'he unwinding thread proceeds from the cake through the guide Il.

The wrapping of Figure 4 is similarly manipulated except that thereis no overhanging portion corresponding to portion I0 needed to be turned back Figures 7 to 9 illustrate the application of the paper wrapper by mechanical means, such as the device disclosed and claimed in the application of McDermott Ser. No. 568,462 led December 16,

i944. schematically, th'e mechanism comprises l an annular support I5 for the package, upright radially movable ngers I8 the upper ends of which present a cup-like hollow I1, and a cylindrical shell I8 which is axially movable with respect to the support I5 and the ngers I8. The wrapping is started with the mechanical elements in the position shown in Figure 7, the paper sleeve being slipped over the fingers I6 and about the shell I8. An end portion of the wrapper is tucked -back into the hollow I1 if a package similar -to Figure 5 isvdesired; otherwise, the wrapper may be pulled down till its top edge is near the top of the fingers. When wrappers having unslitted bands similar to those of Figures 2 and 3 are used, the u'nslitted portions are preferably disposed about the ngers so that they will be at the interior of the package when it is completed. A packlage is then placed upon the platform I5 the ngers I8 are expanded, and the portion of the wrapper, if any, tucked into the h'ollow Il, is

pulled about the top of the package as shown in Figure 8. Thereafter, the shell is displaced vertically .as shown in Figure 9 thus bringing the wrapper around the outside of the package. Fi-

nally the portion overh'anging the upper rim of the individual portion tea bags are satisfactory.A

Papers made from regenerated cellulose bers. such as are obtainable from viscose or cuprammonium cellulose solutions, of lengths from about inch to one inch or longer have high wet strengths and may be used successfully in the practice of this invention, Any permeable paper which has increased wet-strength as the result of resin impregnation during or subsequent to their formation into a sheet is suitable. Examples of such papers are those which are formed from bers impregnated with urea-formaldehyde, pheno1-formaldehyde, melamine-formaldehyde resins and the like. Other suitable covering mate- -rials are those of paper-thin felts made from iibers either oi' paper or textile making length comprising a small proportion of activatabie bers or consisting entirely thereof which are caused to adhere to each other as well as to the non-activatable bers, if any, wherever they touch by activation to an adhesive state and subsequent deactivation. lSuitable `activatable bers include thermoplastic fibers of the celluloseester type, such as thermoplastic cellulose acetate, and of the vinyl'resin type, such asthe polyvinyl chlorides, copolymers of vinyl chloride with vinyl acetate, and after-chlorinated polyvinyl chlorides or copolymers of vinyl 'chlorideand vinyl acetate.V

Such bers may be activated to an adhesive condition by heat or by solvent or swelling agents. The papers or paper-like felts containing such bers may be compacted under pressure while the fibers are in adhesive condition to assure adhesion together at their points of crossing and .may be deactivated by cooling or evaporation of solvent. The use of the vinyl resin bers is especially advantageous where the processing liquids to which the wound packages are subjected are highly corrosive, and for this purpose, a, paper composed entirely of chemically -resistant vinyl resin bers may be used, the permeability and wet strength in such case being controlled either by careful control over the conditions of activation or by mixing a selected proportion of vinyl resin bers which are activatable at a lower ltemperature or by a lower concentration of solvent agent than the rest of the vinyl resin bers. 'I'hus bers made of the less easily activated after-chlorinated copolymers of 70 to 95 parts by weight vinyl chloride with 30 to 5 parts by weight of vinyl acetate may be mixed with a,I predetermined proportion of fibers made of the corresponding unchlorinated copolymers.

Theexpansible and elastic permeable paper wrappers of this .invention have numerous advantages as explained to some extent above. It has been found by actual experience that the inside windings of cakes and the like suffer less displacement during processing and shipment when wrapped with thepaper wrappers and especiaiiy the types 4shown in Figures 2 and 3 of this invention than when wrapped in the conventional knitted sleeves. 'Ihey are inexpensive Vdrying and the like and finally during transportation ofthe package to another plant for paratory operations. This makes it possible for the rst time to economically ship cakes or other packages of rayon or other artificial filaments. Heretofore, in the production of artificial laments it has been the practice to rewind such originaly collection packages into other forms,'

.rewinding, throwing, and other textile or presuch as cones or skeins, and to ship the latter packages.- This involves an extra winding operation where the customer requires'a diierent type of package for his operation which can only be avoided by makingit possible to ship the original collection packages. The knitted wrappers heretofore used for protecting the packages during processing are too expensive to be thrown away after a single use and hence any shipment of the packages in such a wrapper rev like material of sufcient thinness and flexibility to be readily conformed generally to both the inside and outside peripheral surfaces of an vannular package and having a multiplicity of spaced short slits arranged longitudinally in rows extending generally parallel to the axis of the member, the slits in some of the rows being illao staggered so that their geometric projections ex- 4 tend across the gaps between the slits in adjacent rows.

2. A protective cover for wound annular fila- V mentary packages comprising an open-ended sleeve-like member of permeable paper or paperlike material of suflicient thinness and flexibility to be readily conformed generally to both the inside and outside peripheral surfaces of an annular package and having a multiplicity of short `slits extending generally parallel to the axis of the member; the slits being arranged in two sets of rows extending generally parallel to the axis of the member, the rows of one set alternating with those of the other and the slits in each row overlapping the gaps between the slits of the rows adjacent thereto. v

3. A protective cover for wound annular niamentary packages comprising an open-ended sleeve-like member of permeable paper or paperlike material of suiilcient thinness and flexibility to be readily conformed generally to both the inside and outside peripheral surfaces of an annular package and having a peripheral zone or band provided with a multiplicity of spaced short slits arranged longitudinally in rows extending generally parallel to the axis of the member, the

slits in some of the rows being staggered `so that their geometric Y projections extend across the gaps between the slits in adjacent rows. and another peripheral zone or band having at least one relatively large unbroken area. the latter zone being longitudinally adjacent to the firstmentioned zone.

4. A protective cover for wound annular filamentary packages comprising an open-ended sleeve-like member of permeable paper or paperlike materialof sufficient thinness and flexibility to be readily conformed generally to both the inside and outside peripheral surfaces -of an annular package and having two longitudinally spaced peripheral zones or bands each provided with a multiplicity of short slits extending generally parallel to the axis of the member, the slits being arranged in two sets of rows extending generally parallel to the axis of the member, the rows of one setalternating with those of the other and the slits inveach row overlapping the gaps between the slits of the rows adjacent thereto and an intermediate peripheral zone or band having at least one relatively' large unbroken area. e

FERDINAND A. DECKER. Jn. LYNWILL K, sPaNGLEn. v- 

